Ilya

Your pip is newer than the one used by the authors. The error is a result of a change in the dependency resolver in pip 20.3: https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html. As a workaround...

> I followed this but it didn't work Just in case: there is a typo in the line. The proper one is: `pip install --require-hashes --use-deprecated=legacy-resolver -r requirements.txt`

Another example (from Win):